Motor parallel transmission portable angle grinder

ABSTRACT

The present invention relates to a motor parallel transmission portable angle grinder with a motor rotating part spindle parallel installed in a position adjacent to a grinding wheel spindle to form a parallel transmission device driving the grinding wheel. By means of the parallel transmission device, the present invention prevents the emission of noise made by angle type transmission devices; and/or an inertial body is installed on the motor rotating part to form a flywheel to improve the grinding, polishing and machining or cutting abilities of the grinding wheel; and/or a motor is established to be open or semi-hermetic for the space from the interior to a housing and/or a handle of the motor to improve the effect of heat dissipation outward.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention relates to a motor parallel transmission portable angle grinder with a motor rotating part spindle parallel installed in a position adjacent to a grinding wheel spindle to form a parallel transmission device driving the grinding wheel. By means of the parallel transmission device, the present invention prevents the emission of noise made by angle type transmission devices; and/or an inertial body is installed on the motor rotating part to form a flywheel to improve the grinding, polishing and machining or cutting abilities of the grinding wheel; and/or a motor is established to be open or semi-hermetic for the space from the interior to a housing and/or a handle of the motor to improve the effect of heat dissipation outward. Aside from a manually controlled electromechanical device, a power storing and discharging device is also installed in the handle for use as a power source.

(b) Description of the Prior Art

Traditional motor-drive right-angle type portable grinder is an electrical tool designed according to ergonomics. Its structural features are the following:

1. The angular difference between the handle axis extending from the housing and the grinding wheel axis is between 30° and 150°;

2. The electric motor is installed in the handle; and

3. An angle type transmission device such as a bevel gear set is present in between the grinding wheel spindle and the motor spindle installed in the handle;

Because the above structure necessitates an angle type transmission device, the resulting very loud noise is the deficiency.

SUMMARY OF THE INVENTION

The present invention relates to a motor parallel transmission portable angle grinder with a motor rotating part spindle parallel installed in a position adjacent to a grinding wheel spindle to form a parallel transmission device driving the grinding wheel. By means of the parallel transmission device, the present invention prevents the emission of noise made by angle type transmission devices; and/or an inertial body is installed on the motor rotating part to form a flywheel to improve the grinding, polishing and machining or cutting abilities of the grinding wheel; and/or a motor is established to be open or semi-hermetic for the space from the interior to a housing and/or a handle of the motor to improve the effect of heat dissipation outward. Aside from a manually controlled electromechanical device, a power storing and discharging device is also installed in the handle for use as a power source.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural drawing showing the main components of the motor parallel transmission portable angle grinder of the present invention; and

FIG. 2 is a structural drawing showing an embodiment, wherein the motor and the housing separates with each other, according to the present invention.

DESCRIPTION OF MAIN COMPONENT SYMBOLS

-   (100): Electric motor -   (200): Motor rotating part -   (205): Motor static part -   (210): Power storing and discharging device -   (211): Motor control circuit device -   (212): Manually operated electromechanical device -   (215): Power cord -   (216): Charging control circuit device -   (300): Motor spindle -   (310): Inertial body -   (320): Parallel transmission device -   (330): Grinding wheel spindle -   (400): Housing -   (410): Guard -   (500): Handle -   (800): Grinding wheel

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention relates to a motor parallel transmission portable angle grinder with a motor rotating part spindle parallel installed in a position adjacent to a grinding wheel spindle to form a parallel transmission device driving the grinding wheel. By means of the parallel transmission device, the present invention prevents the emission of noise made by angle type transmission devices; and/or an inertial body is installed on the motor rotating part to form a flywheel to improve the grinding, polishing and machining or cutting abilities of the grinding wheel; and/or a motor is established to be open or semi-hermetic for the space from the interior to a housing and/or a handle of the motor to improve the effect of heat dissipation outward. Aside from a manually controlled electromechanical device, a power storing and discharging device is also installed in the handle for use as a power source. FIG. 1 is a structural drawing showing the main components of the motor parallel transmission portable angle grinder. The structural pattern of the outer rotation type motor parallel transmission portable angle grinder as shown in FIG. 1 is formed by the rotating part of the drive motor driving the grinding wheel spindle through the parallel transmission device (320). The main components include:

-   -   Electric motor (100): consisted of alternating or direct         current, brush or brushless, synchronous or asynchronous,         internal or outer rotation type electric motor, including a         motor static part (205) and an motor rotating part (200), which         are cylindrical, conical or disc type, wherein the motor static         part (205) of the electric motor (100) is installed within a         housing (400), the deflection angle between the axis of a         spindle (300) of the motor rotating part (200) of the electric         motor (100), which is parallel with the axis of a grinding wheel         spindle (330), and the axis of a handle (500) is between 30° and         150°, and/or a inertial body (310) is installed on the motor         rotating part (200) and/or the motor spindle (300) to make high         speed and high inertial rotary drive to drive the grinding wheel         spindle (330) through parallel transmission device (320) to         facilitate the operations of grinding, polishing or cutting         workpieces by a grinding wheel (800) or a circular saw, and the         grinding wheel (800) or the circular saw is installed on the         grinding wheel spindle (330);     -   Housing (400): related to a hermetic structure formed by solid         state material for the installation of the electric motor (100)         and the handle (500) formed by an extended body or assembly,         wherein the motor static part (205) of the electric motor (100)         is installed within the housing (400); and the deflection angle         between the axis of the spindle (300) of the rotating part (200)         of the drive motor (100), which is parallel with the axis of the         grinding wheel spindle (330), and the axis of the handle (500)         is between 30° and 150°;     -   Parallel transmission device (320): consisted of at least one         set of the followings including parallel transmission gear set,         and/or sprocket and chain set, and/or friction wheel set, and/or         pulley and belt set, and/or toothed pulley and toothed belt set         for transmitting the rotary kinetic energy of the rotating part         (200) of the drive motor (100) to the grinding wheel spindle         (330), wherein the spindle (300) of the rotating part (200) of         the drive motor (100) is parallel with the grinding wheel         spindle (330);     -   Handle (500): related to a hollow body for the installation of         one or more of the following circuit devices including power         cord (215), manually operated electromechanical device (212),         and optional devices like power storing and discharging device         (210), and/or charging control circuit device (216), and/or         motor control circuit device (211), and/or an indicator lamp,         and/or power display device for the operational control of the         motor parallel transmission portable angle grinder;     -   Manually operated electromechanical device (212): related to an         interface that directly or by way of the control circuit (211)         provides the operator with the control over the direct         motor-drive portable angle grinder, and is formed by         electromechanical or solid state electronic structure for         turning the motor on or off, and/or changing the rotational         speed and/or varying the speed;     -   Power storing and discharging device (210): consisted of         rechargeable and dischargeable batteries or ultracapacitors, and         is configured as need;     -   Motor control circuit device (211): related to a circuit device         formed by electromechanical and/or solid state electronic         circuit device and configured as need for the execution of         turning the motor on and off, and/or changing the rotational         speed and/or varying the speed, and/or for the control and         protection of voltage and current;     -   Charging control circuit device (216): related to a circuit         device formed by electromechanical and/or solid state electronic         circuit device and configured as need for controlling the         external power supply over charging power supply, current and         power-down timing for the power storing and discharging device         (210);     -   Grinding wheel (800): installed on the spindle (300) of the         motor rotating part (200) to provide rotary drive operation for         grinding, polishing and cutting workpieces; and     -   Guard (410): installed on one side of the grinding wheel (800)         and the rotating part (200) adjacent to the handle.

The characterized in that is the motor established to be open or semi-hermetic for the space from the interior to the housing and/or the handle of the motor to improve the effect of heat dissipation outward, and/or the inertial body (310) installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to facilitate the grinding, polishing or cutting operations of the grinding wheel (800) or a circular saw.

The motor parallel transmission portable angle grinder can also be a composite structure, in which the electric motor (100) and the housing (400) separate with each other.

FIG. 2 is a structural drawing showing an embodiment, wherein the motor and the housing separate with each other, according to the present invention.

FIG. 2 shows an embodiment of a composite structure, wherein the motor and the housing separate with each other, according to the present invention. The main components include:

-   -   Electric motor (100): consisted of alternating or direct         current, brush or brushless, synchronous or asynchronous,         internal or outer rotation type electric motor, including a         motor static part (205) and an motor rotating part (200), which         are cylindrical, conical or disc type, wherein the electric         motor (100) is installed within a housing (400), the deflection         angle between the axis of a spindle (300) of the motor rotating         part (200) of the electric motor (100), which is parallel with         the axis of a grinding wheel spindle (330), and the axis of a         handle (500) is between 30° and 150°, and/or a inertial body         (310) is installed on the motor rotating part (200) and/or the         motor spindle (300) to make high speed and high inertial rotary         drive to drive the grinding wheel spindle (330) through parallel         transmission device (320) to facilitate the operations of         grinding, polishing or cutting workpieces by a grinding wheel         (800) or a circular saw, and the grinding wheel (800) or the         circular saw is installed on the grinding wheel spindle (330);     -   Housing (400): related to a hermetic structure formed by solid         state material for the installation of the electric motor (100)         which is hermetic, semi-hermetic or open type and the handle         (500) formed by an extended body or assembly, wherein the         electric motor (100) is installed within the housing (400); and         the deflection angle between the axis of the spindle (300) of         the rotating part (200) of the drive motor (100), which is         parallel with the axis of the grinding wheel spindle (330), and         the axis of the handle (500) is between 30° and 150°;     -   Parallel transmission device (320): consisted of at least one         set of the followings including parallel transmission gear set,         and/or sprocket and chain set, and/or friction wheel set, and/or         pulley and belt set, and/or toothed pulley and toothed belt set         for transmitting the rotary kinetic energy of the rotating part         (200) of the drive motor (100) to the grinding wheel spindle         (330), wherein the spindle (300) of the rotating part (200) of         the drive motor (100) is parallel with the grinding wheel         spindle (330);     -   Handle (500): related to a hollow body for the installation of         one or more of the following circuit devices including power         cord (215), manually operated electromechanical device (212),         and optional devices like power storing and discharging device         (210), and/or charging control circuit device (216), and/or         motor control circuit device (211), and/or an indicator lamp,         and/or power display device for the operational control of the         motor parallel transmission portable angle grinder;     -   Manually operated electromechanical device (212): related to an         interface that directly or by way of the control circuit (211)         provides the operator with the control over the direct         motor-drive portable angle grinder, and is formed by         electromechanical or solid state electronic structure for         turning the motor on or off, and/or changing the rotational         speed and/or varying the speed;     -   Power storing and discharging device (210): consisted of         rechargeable and dischargeable batteries or ultracapacitors, and         is configured as need;     -   Motor control circuit device (211): related to a circuit device         formed by electromechanical and/or solid state electronic         circuit device and configured as need for the execution of         turning the motor on and off, and/or changing the rotational         speed and/or varying the speed, and/or for the control and         protection of voltage and current;     -   Charging control circuit device (216): related to a circuit         device formed by electromechanical and/or solid state electronic         circuit device and configured as need for controlling the         external power supply over charging power supply, current and         power-down timing for the power storing and discharging device         (210);     -   Grinding wheel (800): installed on the spindle (300) of the         motor rotating part (200) to provide rotary drive operation for         grinding, polishing and cutting workpieces; and     -   Guard (410): installed on one side of the grinding wheel (800)         and the rotating part (200) adjacent to the handle.

The characterized in that is the motor established to be open or semi-hermetic for the space from the interior to the housing and/or the handle of the motor to improve the effect of heat dissipation outward through the housing (400), and for the inertial body (310) installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to facilitate the grinding, polishing or cutting operations of the grinding wheel (800) or a circular saw. 

1. A motor parallel transmission portable angle grinder, in which a motor rotating part spindle parallel installed in a position adjacent to a grinding wheel spindle forms a parallel transmission device driving the grinding wheel; by means of the parallel transmission device, the present invention prevents the emission of noise made by angle type transmission devices; and/or an inertial body is installed on the motor rotating part to form a flywheel to improve the grinding, polishing and machining or cutting abilities of the grinding wheel; and/or a motor is established to be open or semi-hermetic for the space from the interior to a housing and/or a handle of the motor to improve the effect of heat dissipation outward; the main components of the grinder including: Electric motor (100): consisted of alternating or direct current, brush or brushless, synchronous or asynchronous, internal or outer rotation type electric motor, including a motor static part (205) and an motor rotating part (200), which are cylindrical, conical or disc type, wherein the motor static part (205) of the electric motor (100) is installed within a housing (400), the deflection angle between the axis of a spindle (300) of the motor rotating part (200) of the electric motor (100), which is parallel with the axis of a grinding wheel spindle (330), and the axis of a handle (500) is between 30° and 150°, and/or a inertial body (310) is installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to drive the grinding wheel spindle (330) through parallel transmission device (320) to facilitate the operations of grinding, polishing or cutting workpieces by a grinding wheel (800) or a circular saw, and the grinding wheel (800) or the circular saw is installed on the grinding wheel spindle (330); Housing (400): related to a hermetic structure formed by solid state material for the installation of the electric motor (100) and the handle (500) formed by an extended body or assembly, wherein the motor static part (205) of the electric motor (100) is installed within the housing (400); and the deflection angle between the axis of the spindle (300) of the rotating part (200) of the drive motor (100), which is parallel with the axis of the grinding wheel spindle (330), and the axis of the handle (500) is between 30° and 150°; Parallel transmission device (320): consisted of at least one set of the followings including parallel transmission gear set, and/or sprocket and chain set, and/or friction wheel set, and/or pulley and belt set, and/or toothed pulley and toothed belt set for transmitting the rotary kinetic energy of the rotating part (200) of the drive motor (100) to the grinding wheel spindle (330), wherein the spindle (300) of the rotating part (200) of the drive motor (100) is parallel with the grinding wheel spindle (330); Handle (500): related to a hollow body for the installation of one or more of the following circuit devices including power cord (215), and manually operated electromechanical device (212) for the operational control of the motor parallel transmission portable angle grinder; Manually operated electromechanical device (212): related to an interface that directly or by way of the control circuit (211) provides the operator with the control over the direct motor-drive portable angle grinder, and is formed by electromechanical or solid state electronic structure for turning the motor on or off, and/or changing the rotational speed and/or varying the speed; Grinding wheel (800): installed on the spindle (300) of the motor rotating part (200) to provide rotary drive operation for grinding, polishing and cutting workpieces; and Guard (410): installed on one side of the grinding wheel (800) and the rotating part (200) adjacent to the handle; and the characterized in that is the motor established to be open or semi-hermetic for the space from the interior to the housing and/or the handle of the motor to improve the effect of heat dissipation outward, and/or the inertial body (310) installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to facilitate the grinding, polishing or cutting operations of the grinding wheel (800) or a circular saw.
 2. The motor parallel transmission portable angle grinder as claimed in claim 1, wherein the electric motor (100) and the housing (400) can also be a composite structure for separating with each other; the main components of the grinder including: Electric motor (100): consisted of alternating or direct current, brush or brushless, synchronous or asynchronous, internal or outer rotation type electric motor, including a motor static part (205) and an motor rotating part (200), which are cylindrical, conical or disc type, wherein the electric motor (100) is installed within a housing (400), the deflection angle between the axis of a spindle (300) of the motor rotating part (200) of the electric motor (100), which is parallel with the axis of a grinding wheel spindle (330), and the axis of a handle (500) is between 30° and 150°, and/or a inertial body (310) is installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to drive the grinding wheel spindle (330) through parallel transmission device (320) to facilitate the operations of grinding, polishing or cutting workpieces by a grinding wheel (800) or a circular saw, and the grinding wheel (800) or the circular saw is installed on the grinding wheel spindle (330); Housing (400): related to a hermetic structure formed by solid state material for the installation of the electric motor (100) which is hermetic, semi-hermetic or open type and the handle (500) formed by an extended body or assembly, wherein the electric motor (100) is installed within the housing (400); and the deflection angle between the axis of the spindle (300) of the rotating part (200) of the drive motor (100), which is parallel with the axis of the grinding wheel spindle (330), and the axis of the handle (500) is between 30° and 150°; Parallel transmission device (320): consisted of at least one set of the followings including parallel transmission gear set, and/or sprocket and chain set, and/or friction wheel set, and/or pulley and belt set, and/or toothed pulley and toothed belt set for transmitting the rotary kinetic energy of the rotating part (200) of the drive motor (100) to the grinding wheel spindle (330), wherein the spindle (300) of the rotating part (200) of the drive motor (100) is parallel with the grinding wheel spindle (330); Handle (500): related to a hollow body for the installation of one or more of the following circuit devices including power cord (215), and manually operated electromechanical device (212) for the operational control of the motor parallel transmission portable angle grinder; Manually operated electromechanical device (212): related to an interface that directly or by way of the control circuit (211) provides the operator with the control over the direct motor-drive portable angle grinder, and is formed by electromechanical or solid state electronic structure for turning the motor on or off, and/or changing the rotational speed and/or varying the speed; Grinding wheel (800): installed on the spindle (300) of the motor rotating part (200) to provide rotary drive operation for grinding, polishing and cutting workpieces; and Guard (410): installed on one side of the grinding wheel (800) and the rotating part (200) adjacent to the handle; and the characterized in that is the motor established to be open or semi-hermetic for the space from the interior to the housing and/or the handle of the motor to improve the effect of heat dissipation outward through the housing (400), and/or the inertial body (310) installed on the motor rotating part (200) and/or the motor spindle (300) to make high speed and high inertial rotary drive to facilitate the grinding, polishing or cutting operations of the grinding wheel (800) or a circular saw.
 3. The motor parallel transmission portable angle grinder as claimed in claim 1 or 2, further including installing the motor control circuit device (211) which is formed by electromechanical and/or solid state electronic circuit device for the execution of turning the motor on and off, and/or changing the rotational speed and/or varying the speed, and/or for the control and protection of voltage and current.
 4. The motor parallel transmission portable angle grinder as claimed in claim 1 or 2, further including installing the power storing and discharging device (210) which consists of rechargeable and dischargeable batteries or ultracapacitors.
 5. The motor parallel transmission portable angle grinder as claimed in claim 1 or 2, further including installing the power storing and discharging device (210) and the charging control circuit device (216), in which the charging control circuit device (216) is formed by electromechanical and/or solid state electronic circuit device for controlling the external power supply over charging power supply, current and power-down timing for the power storing and discharging device (210). 